package com.liuning.lock;

/**
 * 测试生产者和消费者问题2：信号灯法，标志位解决
 */
public class TestPC2 {
    public static void main(String[] args) {
        TV tv = new TV();

        new Player(tv).start();
        new Watcher(tv).start();
    }
}

//生产者：演员
class Player extends Thread{

    TV tv;

    public Player(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i % 2 == 0) {
                this.tv.play("快乐大本营正在播放中");
            }else {
                this.tv.play("抖音 记录美好生活");
            }
        }
    }
}
//消费者：观众
class Watcher extends Thread{
    TV tv;

    public Watcher(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            this.tv.watch();
        }
    }
}




//产品：节目
class TV {

    /**
     * 演员表演，观众等待 T
     * 观众观看，演员等待 F
     */

    //表演的节目
    String voice;

    boolean flag = true;

    /**
     * 表演
     * @param voice
     */
    public synchronized void play(String voice) {
        if (!flag) {
            //演员等待
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("演员表演了：" + voice);
        //通知观众观看
        this.notifyAll();
        this.voice = voice;

        this.flag = !this.flag;
    }

    /**
     * 观看
     */
    public synchronized void watch() {
        if (flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("观看了：" + voice);
        //通知演员表演
        this.notifyAll();
        this.flag = !this.flag;
    }
}
